Contents

- 1 What is double in Java with example?
- 2 What is a double data type?
- 3 What is a double value?
- 4 What does a double mean in coding?
- 5 Should I use double or float?
- 6 Which is bigger double or long Java?
- 7 What is difference between double and float?
- 8 What is double data type example?
- 9 Is float and double same?
- 10 How do you write a double value?
- 11 Why double is used in Java?
- 12 Will double accept negative values?
- 13 What’s the difference between double and float in Java?
- 14 How do I printf a double?
- 15 What is the difference between double and decimal?

## What is double in Java with example?

Java double is used to represent floating-point numbers. It uses 64 bits to store a variable value and has a range greater than float type. Frequently Asked Questions.

Float | Double |
---|---|

Width is 32 bits and the range is 1.4e–045 to 3.4e+038 | Width is 64 bits and the range is 4.9e–324 to 1.8e+308 |

4

## What is a double data type?

double: The double data type is a double -precision 64-bit IEEE 754 floating point. Its range of values is beyond the scope of this discussion, but is specified in the Floating-Point Types, Formats, and Values section of the Java Language Specification. For decimal values, this data type is generally the default choice.

## What is a double value?

The double variable can hold very large (or small) numbers. The maximum and minimum values are 17 followed by 307 zeros. The double variable is also used to hold floating point values. A floating point value is one like 8.7, 12.5, 10.1. In other words, it has a “point something” at the end.

## What does a double mean in coding?

The double is a fundamental data type built into the compiler and used to define numeric variables holding numbers with decimal points. C, C++, C# and many other programming languages recognize the double as a type. A double type can represent fractional as well as whole values.

## Should I use double or float?

Double is more precise than float and can store 64 bits, double of the number of bits float can store. Double is more precise and for storing large numbers, we prefer double over float. For example, to store the annual salary of the CEO of a company, double will be a more accurate choice.

## Which is bigger double or long Java?

Double can store numbers larger than 16 digits, but at the cost of truncation/rounding in the low-order digits. If you need more than 19 digits precision you must resort to BigInteger, with the expected decrease in performance. The long data type is a 64-bit signed two’s complement integer.

## What is difference between double and float?

While float has 32 bit precision for floating number (8 bits for the exponent, and 23* for the value), i.e. float has 7 decimal digits of precision. As double has more precision as compare to that of flot then it is much obvious that it occupies twice memory as occupies by the float data type.

## What is double data type example?

You can use exponential notation in DOUBLE literals or when casting from STRING, for example 1.0e6 to represent one million. Casting an integer or floating-point value N to TIMESTAMP produces a value that is N seconds past the start of the epoch date (January 1, 1970).

## Is float and double same?

Though Float and Double both of them are used for assigning real (or decimal) values in programming there is a major difference between these two data types. Float takes 4 bytes for storage. Double takes 8 bytes for storage. A value having a range within 1.2E-38 to 3.4E+38 can be assigned to float variables.

## How do you write a double value?

Example 1

- public class Double_doubleValueMethod_Example1 {
- public static void main(String[] args) {
- // returns the double value of this Double object.
- Double obj1=5.7;
- System.out.println( “Result after being converted to double value = “+obj1. doubleValue ()*4);
- //method would convert to double value.

## Why double is used in Java?

The Java double keyword is a primitive data type. It is a double -precision 64-bit IEEE 754 floating point. It is used to declare the variables and methods. It generally represents the decimal numbers.

## Will double accept negative values?

One of the tricky parts of this question is that Java has multiple data types to support numbers like byte, short, char, int, long, float, and double, out of those all are signed except char, which can not represent negative numbers.

## What’s the difference between double and float in Java?

Precision: float is a single precision floating point operation. In other words, a float can give you 6-7 digits decimal points precision. double is a double precision floating point operation. In other words, double can give you 15-16 decimal points precision.

## How do I printf a double?

We can print the double value using both %f and %lf format specifier because printf treats both float and double are same. So, we can use both %f and %lf to print a double value.

## What is the difference between double and decimal?

Double (aka double ): A 64-bit floating-point number. Decimal (aka decimal ): A 128-bit floating-point number with a higher precision and a smaller range than Single or Double.